Overview
CVE-2025-12183 describes a critical vulnerability affecting the org.lz4:lz4-java library, versions 1.8.0 and earlier. This flaw allows remote attackers to trigger out-of-bounds memory operations by providing crafted, untrusted compressed input. Exploitation can lead to a denial-of-service (DoS) condition and potentially enable the reading of adjacent memory, potentially exposing sensitive information.
Technical Details
The vulnerability stems from insufficient bounds checking during the decompression process. When processing maliciously crafted compressed data, the lz4-java library attempts to access memory locations outside the allocated buffer. This out-of-bounds access can corrupt memory, crash the application, or, in more severe cases, allow an attacker to read data from memory regions beyond the intended buffer.
CVSS Analysis
While the provided information states that the CVSS Score and Severity are N/A, the description of the vulnerability suggests a high potential impact. A more thorough analysis would likely result in a CVSS score reflecting a high severity due to the potential for DoS and information disclosure. Typically, out-of-bounds read vulnerabilities are rated as High or Critical depending on the scope of the data that can be accessed.
Possible Impact
- Denial of Service (DoS): An attacker can crash applications using the vulnerable
lz4-javalibrary by sending specially crafted compressed data. This can disrupt services and cause downtime. - Information Disclosure: The out-of-bounds read could potentially allow an attacker to read sensitive data from memory, such as API keys, passwords, or other confidential information.
Mitigation or Patch Steps
The recommended mitigation is to upgrade to org.lz4:lz4-java version 1.8.1 or later. This version includes a patch that addresses the out-of-bounds memory access issue. Verify the upgrade by checking the version number in your project’s dependency management tool (e.g., Maven, Gradle). After upgrading, thoroughly test your application to ensure compatibility and proper functionality.